/Engine/Source/Runtime/CoreUObject/Public/Blueprint/BlueprintSupport.h
Specialized FDeferredInitializationTracker for tracking deferred Blueprint CDOs specifically. (every object in DeferredInitializers should be a BP CDO).
struct FDeferredCdoInitializationTracker : public [FDeferredInitializationTrackerBase](API\Runtime\CoreUObject\Blueprint\FDeferredInitializationTrackerBa-), public [TThreadSingleton< FDeferredCdoInitializationTracker >](API\Runtime\Core\HAL\TThreadSingleton)